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#ifndef __PLUGININSTANCEBASE_H__
#define __PLUGININSTANCEBASE_H__

#include "npplat.h"

struct nsPluginCreateData {
    NPP instance;
    NPMIMEType type;
    uint16 mode;
    int16 argc;
    char **argn;
    char **argv;
    NPSavedData *saved;
};

class nsPluginInstanceBase {
  public:
    // these three methods must be implemented in the derived
    // class platform specific way
    virtual NPBool init(NPWindow * aWindow) = 0;
    virtual void shut() = 0;
    virtual NPBool isInitialized() = 0;

    // implement all or part of those methods in the derived 
    // class as needed
    virtual NPError SetWindow(NPWindow * pNPWindow) {
        return NPERR_NO_ERROR;
    } virtual NPError NewStream(NPMIMEType type, NPStream * stream, NPBool seekable, uint16 * stype) {
        return NPERR_NO_ERROR;
    }
    virtual NPError DestroyStream(NPStream * stream, NPError reason) {
        return NPERR_NO_ERROR;
    }
    virtual void StreamAsFile(NPStream * stream, const char *fname) {
        return;
    }
    virtual int32 WriteReady(NPStream * stream) {
        return 0x0fffffff;
    }
    virtual int32 Write(NPStream * stream, int32 offset, int32 len, void *buffer) {
        return len;
    }
    virtual void Print(NPPrint * printInfo) {
        return;
    }
    virtual uint16 HandleEvent(void *event) {
        return 0;
    }
    virtual void URLNotify(const char *url, NPReason reason, void *notifyData) {
        return;
    }
    virtual NPError GetValue(NPPVariable variable, void *value) {
        return NPERR_NO_ERROR;
    }
    virtual NPError SetValue(NPNVariable variable, void *value) {
        return NPERR_NO_ERROR;
    }
};

// functions that should be implemented for each specific plugin

// creation and destruction of the object of the derived class
nsPluginInstanceBase *NS_NewPluginInstance(nsPluginCreateData * aCreateDataStruct);
void NS_DestroyPluginInstance(nsPluginInstanceBase * aPlugin);

// global plugin initialization and shutdown
NPError NS_PluginInitialize();
void NS_PluginShutdown();

#ifdef XP_UNIX
// global to get plugins name & description 
NPError NS_PluginGetValue(NPPVariable aVariable, void *aValue);
#endif

#endif                          // __PLUGININSTANCEBASE_H__
